Intaglio engraving press



Dec. 15, 1953 E. A. GILLIS INTAGLIO ENGRAVING PRESS 4 Sheets-Sheet 1 Filed April 6, 1950 r W f d r IIIWI MHWVH/IIWIII 4 IIIPI INVENTOR. E DMUND A. GILLIS ATTORNEY Dec. 15, 1953 E. A. GILLIS INTAGLIO ENGRAVING PRESS 4 Sheets-Sheet 2 Filed April 6, 1950 EDMUND ATTORNEY Dec. 15, 1953 Filed April 6, 1950 E. A. GILLIS INTAGLIO ENGRAVING PRESS 4 Sheets-Sheet 5 JNVENTOR. EDMUND A. GILLIS ATTQRNEY Dec. 15, 1953 E- A. GILLIS INTAGLIO ENGRAVING PRESS Filed April 6, 1950 4 Sheets-Sheet 4 INVENTOR. EDMUND A. GILLIS BY ATTORN EY' Patented Dec. '15, 1953 gin 2,662,471 INTAGLIO ENGRAVING PRESS Edmund A. Gillis, Oceanside, N. 1 assignor to The Cronite. 00., Inc., New York, N poration of New York Y., a. cor- Application April 6, 1950, Serial N 0. 154,258 15 Claims (Cl. 101164) This invention relates to intaglio. engraving presses. It is particularly directed to, an intaglio. engraving press, such as a die stamping press, having means for feeding an endless belt for Wiping the die.

One object of this invention is to provide in a. machine of the character described, a separate power drive for feeding the belt.

In intaglio engraving presses such as die stamping presses, the standard equipment in cludes means for raising and lowering a wiping pad. When lowered, the pad presents a wiping section of the belt to the When the pad is raised, the belt will not contact the die. When the pad is raised, the belt is advanced in regular increments to repeatedly present clean sections of belt to the die for each wiping operation. At the moment of wiping contact, the belt remains stationary. It is therefore another object of this invention to provide highly improved means for synchronizing the belt drive to the imprinting cycle, of the press, and to provide means for varying the length of the increments of belt feed, so that after the die is wiped, only a desired length of belt is fed, sufficient to bring the part of the. belt soiled with ink beyond the pad, so that the: next time the die rubs or Wipes against the belt, a clean portion of the belt is presented, and whereby the portions of the belt between wiped portions is minimized.

The belt is usually formed with a seam. This seam, it allowed to wipe the die, would cause one or more spoiled imprints. It is therefore yet another object of this invention to insure movement of the seam from in advance of the pad to. a position entirely beyond the pad in asingle increment of movement, so that the seam will notwipe the die.

It is a further object of this invention to; provide in a machine of the character described, ameans for accelerating movement of the wiping belt when the seamed portion of the belt approaches the die so that the seam will completely and quickly pass the wiping section without allowing the seam to wipe the die.

On many engraving die stamping presses which can utilize endless wiping belts, the actuating mechanism formerly used to feed wiping paper from one roll and rewind the paper on another roll is not strong enough to properly drive an end-- less wiper belt, particularly when the endless wiper belt must contain a selected section of the belt under tension, as in the machine described and claimed in application of Robert N. Steffens, application No. 236,555, filedon, March, 22-, 194

2 for Die Stamping Presses and Die Wipers Therefor, now U. S. Patent Serial No. 2,586,108, patented February 19, 1952. For this reason in accordan-ce with the present invention, the means for driving the belt is separate from the means which operates the remaining part of the intaglio press. The advantage of such construction would be that the extra power supplied by the separate driving means for the belt would relieve the driving means for the remainder of the machine.

Yet another object of this invention is to provide a machine of the character described having means. to cause imperfect parts of the belt, or seamed portions of the belt,to pass the die Wiping station and preventing wiping of the die against such imperfect parts of the belt, or against the seams. Suchan arrangement will permit the use of shorter belts and will also permit patching of old belts because the numerous seams would all be passed over at the wiping point without wiping the die or spoiling any imprints. Such arrangement would furthermore permit longer use of worn belts.

In accordance with this invention a two speed motor can be used for driving the belt, the arrangement being, such that a lower normal speed wouldbe used, for ordinary feeding of the belt, whereas the motor would be speeded up to pass imperfect. or seamed portions of the belt. Such of the belt, which; would result in less wear on the belt and less shock as power is turned on and oil, and also would permit more parts of the belt to remain in the cleaning solution which cleans the ink off thebelt.

invention will be indicated in the following claims.

In the accompanying drawings in which is shown various illustrative embodiments of this invention,

Fig. l is a front elevational view of a. machine embodying the-invention;

Fig, 2 is an enlarged cross-sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is a cross-sectional view taken on line 3-3 of Fig. 2;

Fig. 4 is a partial view of the structure shown in Fig. 3, with parts in cross-section;

Fig. 5 is a cross-sectional view taken on line 5-5 of Fig. 2;

Fig. 6 is a cross-sectional view taken on line 6-5 of Fig. 1;

Fig. '7 is a wiring diagram illustrating the electrical hook-up for controlling the solenoid which controls the belt drive clutch;

Fig, 8 is a view similar to Fig. l but illustrating a modified. construction;

Fig. 9 is an enlarged view of the cam controlling switch for stopping the drive for the belt;

Fig, 10 is a cross-sectional view taken on line ill-Iii ofFig. 9; and

Fig. 11 is a wiring diagram for the machine shown in Fig. 8.

Referring now in detail to the drawing, is designates an intaglio printing press embodying the invention. For purpose of illustration, ma-

chine lii has been shown as a die stamping press for printing engraved stationery. The same comprises a frame H having a base portion 12 from which extends upwardly a frame portion 13. Also supported on the base I2 are a pair of vertical frame plates l4. Extending from portion i3 is a horizontal frame portion or bed I5. Mounted on the frame it is a second frame 15 comprising a base portion i'l mounted on the frame H. Extending from the base ll of the frame is is an upstanding ear 19. Also extending upwardly from base H is a vertical frame portion 29 provided with forwardly extending ears 2i and upstanding cars 22. Slidably mounted on frame portion are bearing blocks 23. Ex-

tending from said portion 20 and disposed above said bearing blocks are fingers 24. Attached to frame portion i5 is a frame portion comprising an upstanding arm 26 and a horizontal bracket or shelf support 2?, for the purpose hereinafter appearing.

Rotatably mounted on the plates I4 is a horizontal shaft 33 carrying a pinion 3| meshing with a gear 32, mounted for rotation on a shaft 33 journaled on said plates. Pivoted to the base l2 as at 34 is a lever 35 having a curved cam slot 36. Fixed for rotation with the shaft 33 is a disc 3'1. Mounted eccentrically on said disc is a roller or pin 38 received within the curved slot 36. The slot 36 is substantially S shaped as shown. Pivoted to the upper end of the arm 35 as at 35 is a link 49. Mounted on the outer end of the arm is a die M which slides in suitable guides on the bed or frame portion l5.

Mounted for rotation on the frame portion i3 is a shaft 43. Fixed to the shaft is a gear Ml which likewise meshes with the pinion 3!. Fixed to said shaft is a disc 45. Attached to said disc is a pin ll. Pivoted to the pin 4! is a link 48. The upper end of the link is pivoted as at 49 to a ram 50. It will now be understood that whereas the die M reciprooates in a horizontal direction on the bed 55, the ram will be reciprocated up and down.

Slidably mounted on the machine in any suitable manner for vertical up and down movement between suitable guides is a wiping pad 5|. Extending upwardly from the wiping pad is an arm or stud 52. Pivoted to the frame it in any suitable manner as at 53 is a bell crank 54. Said bell crank has an arm 55 connected by a pin and slot connection as at 56 to the arm 52 to the wiping pad. Said bell crank 54 has a second arm 5'! carrying a roller or follower 53 at its lower end. Attached to the shaft 43 is a cam 59 having a low dwell portion to and a high dwell portion (3%. As the cam 59 rotates the bell crank 52 will be oscillated in synchronization with the movement of the die ll for lowering and raising the wiping pad. The timing and arrangement of the earns 35, 59, and the gears is such that the pad 5! comes down just before the die 4| passes the wiping pad (going to the right, looking at Fig. 1). A coil tension spring 82 interconnects arm 5'! of the bell crank 55 with the frame, as at 53, so that the follower 58 will remain in contact with the cam as the cam rotates.

Means is provided for applying ink to the top face of the die as the die moves to the left, looking at Fig. l of the drawing. To this end there is pivoted to the frame H as at 65, a bell crank cs having a downwardly extending arm Ell carrying a roller or follower contacting a cam disc 69, mounted on the shaft 53 and rotating therewith. The bell crank '68 further comprises a horizontal arm 16 connected by a coil tension spring it to the base [2 for retaining the follower 63 in engagement with the cam 68. Pivoted to the ear i9 is an arm 12 pivoted as at '53 to a link "ad which is pivoted to the arm 10 as at '55. It will now be understood that as the machine operates, the bell crank 86 will be oscillated for moving the link M up and down and thereby oscillating the arm ":2. The arm 12 is fixed to a shaft 76 journalled on the ear I9.

Fixed to the shaft if: is oscillating arm 11 carrying a transfer roller '58 at its lower end. Mounted on the bed 65 is a container or trough iii) in which is rotatably mounted on a shaft 8i, an ink roller 82. The roller 82 projects above the receptacle ac. As the arm 11 moves in a clockwise direction, looking at Fig. 1, roller 18 contacts roller 32. As the arm 17 oscillates in a counterclockwise direction the roller 18 contacts the top face of the die 4| for transferring ink from the roller 82 to the die. The operations are so related that the roller 18 will be in its downward position as the die passes the roller.

Means is provided to wipe the face of the die so as to clean the face of ink, while permitting ink to remain in the engraved portions or grooves in the die. To this end there is rotatably mounted on the frame 25 a pair of parallel shafts 9d and 95 carrying rollers $2 and 93 respectively. On said shafts are pinions 94 and which intermesh. On the frame 25 are horizontal guides 95. Slidably mounted on said guides 95 is a U shaped bracket 9?. Screwed to the frame 25 is a screw 98 which presses against the bracket 9?. The shaft 9% is journalled in the opposite parallel arms 99 of the bracket 91.

On the ears 2! is rotatably mounted a shaft we carrying a roller fill. J ournalled on the sliding blocks 23 is a shaft H82 disposed above the shaft Hid. Carried by the shaft W2 is a roller Hi3. Screwed to the fingers 2G is a screw (04 which serves to press the sliding blocks 23 downwardly for pressing the roller m3 toward the roller lili. Fixed to shaft IE0 is a sprocket wheel id's. Mounted on shaft 9! is a sprocket wheel m8. The sprocket wheels [61 and lfii! are interconnected by a sprocket chain I09. Thus when the shaft 9i is rotated, in the manner hereinafter to be described, the rollers 93 and 92 will be rotated due to the meshing of the pinions 9.5 and 94. Also, the roller I90 will. be rotated due to the connection of the sprocket chain. I89 with the sproclzet wheels I 03 and I 07.

On the upstanding ears 22 is a horizontal shaft H5 carrying an idler roller III. On the. upstanding frame 28 are shafts H2 and I3 carrying idler rollers ii and Mt. On the frame or bracket 27 is a trough or pan l2il. Rctatably mounted therein is a roller I 2%. hired to the frame in any suitable manner are scrapers I22 and 23 at one side of the roller and scrapers I M and lit at the opposite side of the roller.

There is further provided a die wiping belt I which passes upwardly between the rollers. s2 and 93, then over the idler roller H5, then dOlVl'l-s wardly around the weight Iii, then upwardly around the idler roller H4, then over and around the idler roller I l I, then around the roller it, then passing between the rollers I83 and lei. The belt then extends downwardly and beneath the wiping pad 55. The belt then extends over the scrapers 522 and E23 and then down and around the roller 5 2i in the trough 22s. The belt then contacts successively the scrapers lit and lit. Ink solvent solution is placed in the trough E28 to dissolve ink from the belt. Means hereinafter described is provided for rotating the shaft It will now be understood that when the 5i comes down the die moves to the right against the portion of the belt which contaste the pad, to wipe the surface of the die clean. The die then moves to the right over to a platen P, at which time the work to be pri .ted is placed on the platen and the ram so comes down and causes the printing operation. When the die iI passes the portion of the belt in contact with the pad 5!, the belt is stationary and does not move.

Means is provided to advance the belt at a time when the die is not in contact with the belt, at which time the pad is raised from its downmost position. To this end the shaft iii passes through a bearing its in frame plate I ti fixed to the frame 25. On bracket 27 is an upstanding plate iii provided with a ball bearing i33. Mounted on the bracket 22' is an electric motor 5 34 provided with a central shaft 535. Fixed to the shaft m5 is a coupling member Hit which is keyed to the hub lfita of the outer housing or driver It? of a quarter revolution clutch I3t. Glutch I33 may be of any suitable well known type such as the Hilliard fractional horsepower single revolution clutch, except that the clutch I33 is changed from a single revolution clutch to a quarter revolution clutch. A positive clutch utilizing laterally engaging jaws may also be employed. The clutch I38 comprises a central hub or driven member I353 disposed within the housing l3? and keyed to a coaxial shaft MB journaled in the hub ldiia. The hub E39 is formed with outer flat surfaces idea, and rollers It! are received between the surfaces Etta and the inner surface of housing Loosely mounted on the shaft N38 is disc Mt provided with fingers lt i extending into the spaces which receive the balls iii. Fixed to the shaft Mil adjacent di c 13 is a hub U55 conheated by coil tension spring Hill to the disc The disc M3 is formed with four "atchet teeth lll'i. Although four ratchet teeth are shown, any suitable number may be employed. The spring I 25 tends to rotate the disc I at relative to the shaft l'lli, so that the fingers I t l press the balls M! in a direction for wedging the drive housing tail to the driven hub l39 so that when the motor lid is rotating, the shaft Mil will be rotated.

Means is provided to declutoh the clutch E38. It; will be further understood that should the disc I43 be stopped while the housing continues turning, the rollers I lI will be released from wedging engagement between the hub I39 and the housing 137 by fingers I l i, so that continued rotation of the housing will not drive the shaft I ii] any more until the disc M3 is again released. At such time spring I it again tends to rotate the disc relative to the hub so that fingers its press the rollers into wedging engagement to drive shaft I49.

Means is provided to control the clutch 38. To this end there is pivoted to bracket 553 on bracket 27, as at I51, an arm I52, the upper free end of which is adapted to be moved into or out of the path of the ratchet teeth. On bracket 2? is a bracket I541 and interconnecting said bracket with the lever I is a coil tension spring E55 to normally retain the arm 1-52 out of engagement with respect to the disc Mounted on the bracket 2? is a solenoid 553 comprising a coil 55'! and an armature 58. The armature is pivotably connected as at 59 to the lever I52. When the coil I57 is energized arm is moved to the right, looking at Fig. 3, and the upper end of the lever I 52 moves into the path of the ratchet teeth so that when the next tooth engages the end of the lever, the disc its will be halted and continued movement of the rousing it? will release the rollers from clutching engagement and there fore stop the rotation of the shaft let. The control of the solenoid will be described hereinafter.

The shaft its passes through the bearing l on the support 532. Fixed to the shaft Islii is coupling I58 keyed to the huh I ill of an cute housing hi2 of an overrumiing clutch The clutch may be of any suitable construction such as the Hilliard Overrunning Clutch. It will be noted that the shaft 35 is coaxial with the shaft Mil and is journalled in the hub 5G5. Keyed to said shaft Qi is a hub sea formed with notches I65 in which are received rollers 855 adapted to be wedged against the inner su""aoes of the housing I62. When the shaft hill is rotating, housing I62 will likewise rotate in a counterclockwise direction, looking at Fig. 5, causing the rollers iiiil to turn the hub I35 consequently the shaft iii. A closure plate IE6 fixed to the housing i532 closes the same. The roller may be advanced even while the housing is not rotating. Thus the shaft 9I and consequently the hub Hit may be rotated in a counterclockwise direction, looking at Fig. 5, even when the housing hi2 stationary, and in such case the rollers merely move back against spring pressed pins lfi'i.

While the clutches E38 and is have been described and illustrated in detail, it will be understood that any suitable clutches for the purpose intended may be substituted for the clutches shown. Such clutches are well known and common. It will now be understood that when the motor I34 is energized and solenoid is deenergized, the roller 93 will be rotated and the belt will hence be advanced.

The sprocket wheels it? and i 5?; are so selected that the rollers 513 will rotate at somewhat greater peripheral speed than the roller 59!, so that the portion of the belt passing bet rollers IQI, I83 and down around the wiping pad 5| and through the various scrapers and up to the rollers $2, as will be under a tension greater than the remainder of the belt.

Means is provided to control the energization and deenergization of the solenoid I56 so as to synchronize the advance of the belt with the movement or" the die GI and the wiping pad and also to vary the length of belt fed after each wiping operation to correspond to the size of the die being wiped and to minimize the length of unwiped portions between the wiped portions. The control of the operation of said solenoid I55 also in accordance with the present invention includes means to cause the scam in the belt to run past the wiping pad so as to make sure that the die does not wipe against the seam, as such operation is likely to cause spoilage of imprints.

In the drawing, ilil designates the scam in the belt and Iii designates a hole punched in the belt in advance of, through, or near the seam. On the frame 56 and on opposite sides of the belt and above the wiping pad is a photoelectric cell Hi2 so located that normally the belt prevents a light beam from passing through the belt. When the opening iii passes the photoelectric cell the light beam passes through said opening. The purpose of this photoelectric cell will be apparent hereinafter.

Also x d to the frame It is a normally open switch iiii. Switch H3 comprises a switch arm I'M and a fixed contact H5. The switch I13 is so placed that when the cam 58 pushes the follower to the right, looking at Fig. l, for depressing the wiping pad, the switch Ii3 will close and will be maintained closed while the dwell portion iii of the cam is in contact with the follower 58. When the dwell portion SI passes the follower and the wiping pad raises, the switch IE3 will open.

On shaft 33 is a cam I'ita having a high portion I16. Fixed to the base i2 is a bracket Ill and mounted thereon is a normally open switch I13, comprising a switch arm I19 and a fixed contact 58%. As the high part Iifi of the cam IlEa passes the switch M8 the switch is closed and the switch will open when the cam passes said switch. The cam i'ifia is adjustable angularly on the shaft 33 and may be fixed to the shaft in any desired adjusted angular position by a set screw I8I.

It will be noted that the gears 32 and M rotate in the same direction. Looking at Fig. 1 these gears rotate in a clockwise direction.

The cams 5d and IZ'Sa are so arranged that the cam 58 will pass beyond the follower 58 before the cam H50, closes the switch I18. By properly adjusting the cam lea the angle of rotation of cam 59 beyond follower 58 before the cam i'illa closes the switch ilt may be adjusted.

The motor i3 5 is preferably a two speed motor. It has a common terminal lead I82, a terminal lead E83 connected to the low speed side of the motor, and a terminal IS connected to the high speed side of the motor.

in Fig. I is shown a wiring diagram for the control of the motor I34 and the solenoid I55. The electric controls include a latching relay I35 and a releasing relay I86. When the relay I85 becomes energized it is latched in energizing condition. When the relay lBE is energized it releases the latching relay 585. The latching relay I55 controls a pair of switch arms I37 and I88. The switch arm it? normally engages a fixed contact iii-3. When the latching relay IE5 is energized the switch arm it? moves out of engagement with the fixed contact i829 and into engagement with a fixed contact Iilil. The switch arm I83 is normally open but when the latching relay N35 is energized it moves into engagement with a fixed contact Isl. When the releasing relay I86 is energized to release the latching relay I85, switch arm I88 moves to its normally open position, and switch arm I81 moves from contact we to contact I89.

The photoelectric cell I12 is so arranged that when a light beam passes through the opening Ill said photoelectric cell will, through wiring I92, energize a latching relay Itiia. Said latching relay I921! controls switch arms I94, I85, and I96. The switch arm ISG normally engage a fixed contact I91 connected to the terminal I83. When the latching relay 83 is energized switch arm I94 moves away from fixed contact i9? and into engagement with a fixed contact :98 connected to the terminal I3 The switch arm I is normally open but when relay I93 is energized said switch arm moves into engagement with a fixed contact I99. The switch arm lat is normally in engagement with a fixed contact 28 but when the relay left is energized the switch arm ltd moves away from the fixed contact 2% to open position. When the latching relay E93 oecomes energized it latches in energized condition. There is further provided a releasing relay 28I which when energized releases the latching relay I93 to return the switch arms I96, I95, and I56 to their normal positions.

One side of the coil l5i of the solenoid IE8 is connected by wire 2132 to one side of the power line. The other side of the coil I5! is connected by wire 2515 to the switch arm I531. The contact IE9 is connected by wire 294 to the fixed contact lit The switch arm Ii" is connected by wire 2% to th other power lead. The wire iiilli is connected by wire 286 to the switch arm I95. Wire 283 is connected by wire 28? to the fixed contact iElI. Switch arm i853 is connected by wire 258 to one side of the relay 86. The other side of the relay is connected by wire 239 to one side of the latching relay ihe other side of the latching relay IE5 is connected by wire 2H3 to the fixed contact Wire 2% is connected by wire 2H to wire 262, and by wire 232 to one side of the releasing relay 251. The other side of said releasing relay Edi is connected by wire M3 to the fixed contact Switch arm I9 is connected by wire 2 it? to the common terminal 1232 of the motor. Fixed contact I98 is connected by wire 2M to wire 265. Switch arm H9 is connected by wire ZIE to the switch arm E98. The fixed contact i3?) is connected by wire I23 to the wire 2%.

The operation of the control mechanism wil now be described. As the machine operates, cam 59 will engage the follower 5S and lower the wiping pad 5I as the die 4:, moving to the right looking at Figure l, approaches the portion of the belt engaging the die. Before the die ii reaches the belt, switch I13 is closed so that the switch arm I'M contacts the fixed contact I75, thus completing a circuit through the solenoid I55, through switch arm IS'E, and fixed contact I89. Said solenoid being energized, lever I52 moves to the right into the path of a tooth I41. When the first tooth contacts said lever, the clutch 138 is declutched and the roller 93 stops to stop the advance of the belt. At this time the motor is running on low speed as the switch arm Iiit engages the fixed contact I91 which is connected to the low speed terminal I83. While the motor keeps running at low speed, rotation of the shaft 9| ceases and hence the belt is not being fed and is stationary. While the belt is stationary and the wiping pad 5I is down, the die II wipes against the portion of the belt contacting the wiping pad. After the die passes the wiping pad, going to the right, the cam 59 passes the follower 58 and the wiping pad starts coming up, and switch I33 opens. At this time the solenoid I55 is deenergized and the motor I3d rotates the shaft ll at low speed. However, when the cam Il5a closes the switch lit a circuit is closed through the latching relay 585, through switch I96, 2%, thereby moving switch arm It? out of engagement with respect to fixed contact I89 and into engagement with the fixed contact I90. Also, switch arm I68 moves into engagement with fixed contact It I. This operation completes a circuit through the solenoid through switch I31, I56, and the clutch is again declutched to stop the ieeding of the belt.

Since the angular position of the cam I lea may be adjusted, the length of feed of the belt after each wiping operation may be regulated. Since the latching relay 535 when energized stays in latched condition, opening of the switch I'IS does not deenergize the solenoid I55. The latching relay I35 remains in latched conditioi until the cam 59 again causes closure of the switch I13. When the switch I'e't again closes, the circuit is completed through said switch and through switch I as, I9! through the releasing relay Hi5, thereby releasing the relay I85 and permitting switch arms It! and Itt to move to their normal positions. The solenoid however, remains energized through the switch I'IS until the switch H3 again opens, deenergizes the solenoid and causes the belt to advance.

As the belt continues to be advanced by increments, when the opening Ill passes the photoelectric cell I'I2, the latching relay I93 becomes energized to move switch arm I538 from contact I97 to contact I98 to connect the motor for high speed operation, since in such case the common terminal I82 is connected to the high speed terminal I 34. At the same time switch arm I95 moves down into engagement with contact I99 and switch I96 moves away from contact Since switch I36, 2% opens, the latching relay H35 cannot be energized even if switch I??? closes. Obviously the opening III will pass the photoelectric cell while the belt is being advanced, and that would be during the period after switch lit has been opened and before switch I18 has been closed. Since the closure of switch Iii; prevents energization of relay I85 and the energize.- tion of the solenoid through the switch Itl', I96, said solenoid will remain deenergized and the belt will continue advancing until switch lit again closes. At that time the circuit is completed through switch Il't and switch ltd, through the releasing relay iiIlI "which releases the latching relay I 533 and permits movement of the switch arms Hit, Hi5, and IiIt back to normal condition. With such construction the seam will pass the wiping pad and thereby prevent spoil age of imprints.

Although the opening I'll is shown in the drawing as being in advance of the seam Ihl, it will be understood that an opening can be punched in the belt in advance of any imperfection or defect in the belt to make sure that such imperfection or defect does not stop at the wiping pad, but passes the same.

Referring now to Figs. 8 and ii there i illus trated a modified construction similar to the construction described hereinabove except for the differences to be noted hereinafter.

In the machine its shown in Fig. 8, a cam 22s on shaft 33 replaces the cam I'i'tc. saidcam 220 comprises a fixed cam part 22I which may be fixed to the shaft by a set screw 222 and an adjustable cam part 223 which may be adjusted on the shaft by means of an adjusting screw parts 22I, 223 are adapted to close the switch 578 except for the part between adjacent ends 221a and 223a of the cam parts 22!, 223. On the machine is a micro switch 235 adapted to he passes between roller NH and roller N33. The switch 235 may comprise a switch arm 235 and fixed contact 237. The switch 235 replaces the photoelectric cell of Fig. 1.

Referring now to Fig. 11 there is shown a wiring diagram illustrating the control for the machine Illa. Said controls comprise common terminal I82 for the motor, connected to switch arm Ed t normally in engagement with a fixed contact I91 connected to the low, speed terminal I83 of the motor. The arm I9 is adapted to move out of engagement with contact I El and into engagement with contact m8 connected to the high speed terminal 184 of the motor. The electrical control furthermore comprises a latching relay 24c and a releasing relay 26!. One side of the latching relay Mill is connected by wire 242 to the switch arm 236 of the switch 235. The fixed contact 231 of the switch 235 is connected by wire M3 to one side of the power supply. The wire 243 is connected by wire 2 4 to switch arm I79 of switch I78, and to the switch arm I'M of switch I13.

One side of the coil IE5? or the solenoid I 56 is connected by wire to the other side of power supply. The other side or the latching relay is connected by wire 2% to one side of the releasing relay MI. The other side of the releasing relay 2-H is connected by wire 2:28 to the wire 2%. The other side of the coil i5? of solenoid I55 is connected by wire to the fixed contact 2%. Switch arms I95 and let are connected by wire 252. Wire 255i! is connected to wire 25;? by wire 253. The cam 22d and cam are so arranged that when the cam 59 passesthe follower 58 to open the switch H3 cam part 225 passes the switch Il't so that both said swit"hes o en at the same time. When both the switches lit and I78 are open the solenoid is deenergized and the motor feeds the belt. Cam part 223 furthermore will close the switch lie while switch is still open. Closure of the switch are will energize the solenoid. Thus when switch Iii} closes, the solenoid I energized through switch I95, tilt, and switch i'ii Switch 578 remains closed until both switches I13 and I18 open to deenergize the solenoid.

However, when the seam passe rollers iill. ltd, switch 235 closes and latching relay 240 becomes energized throu h said switch, thereby causing switch arm I94 to move into engagement with contact N58 to weed up the motor. At the same time switch I95, 26!) opens so that even if switch Iii, i thereafter closed the solenoid remains deenergized and the motor keeps advancing the belt quickly until the seam passes the wiping pad. In fact, the motor keeps advancing the belt quickly until switch i it again closes, at which time the releasing relay 24 becomes energized through switch I94 539 and said switch lit. The energization of the releasing relay .Z ZI releases the relay 2463 so that the switch arms I as, I 95, and I 96 move back to normal position.

If there are any defective parts of the belt,

some thickness may be added to the belt in advance of the imperfection, so as to operate the switch 235 and cause the imperfect parts to pass the wiping pad.

A separate motor or any other suitable drivi g means may be employed for rotating the shaft 36. The advantages of the present machine will now be obvious. Ihe drive for the belt is separate from the drive for the rest of the printing press. Means is provided to detect imperfection in the belt and to :reep such imperfections or seams from stopping at the die wiping pad, so that the die will not wipe against scams or imperfections. Another advantage of the present arrangement is the use of a two speed motor so that when the belt is being advanced because of a seam or an imperfection, the belt will move faster during such time and allowing a lower nor-- mal speed of the belt which would result in less wear on the belt and less shock as power is engaged and disengaged and allowing the belt to remain for a longer period in the ink solvent.

Furthermore, with the present construction, it the die is of a certain width the portion of the belt which is wiped by the die would be substantially oi the same length as the width or the die. If a greater length of belt were then advanced then a portion of the advanced belt would not be wiped and if such unwiped portion were considerable there would be a waste due to feeding lengths of belt which do not have any die wiping function. With the present arrangement the lengths of belt which have no wiping function is minimized.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

1. In an intaglio pinting press, a wiping pad, an endless belt in engagement with the pad, means to move the wiping pad against the belt and to retract the pad, a die, means to move the die against a portion of the belt which contacts the pad, means to ink the die, a common drive means for operating the pad moving and retracting means, the die moving means and the inking means, separate drive means for intermittently advancing the belt past the pad, and electrical .vitch actuated means controlled by said common drive means for synchronizing the advance of the belt with the movement of the pad, die and inking means.

2. In an intaglio printing press, a wiping pad, an endless belt in engagement with the pad, means to move the wiping pad. against the belt and away from the belt, a die, means to move the die against a portion of the belt which contacts the pad, means to ink the die, a common drive means for operating the pad moving means, the die moving mean and the inking means, and separate drive means for intermittently advancing the belt past the pad, electrical switch actuated means controlled by said common drive means for synchronizing the advance of the belt with the movement of the pad, die and inking means, and means to vary the length of advance of the belt each time it is advanced.

3. In an intaglio en raving press, a wiping pad, an endless die wiping belt passing beneath the wiping pad, mean to move the wiping pad against an inner part of the belt and also to retract the pad, a die, means to move the die past the portion of the belt contacting the wiping pad when the wiping pad has been moved against the belt to wipe the face of the die, electrical switch actuated means to advance the belt each time the wiping pad is moved away from the belt, and

means to vary the length of travel of the wiping belt.

4. In an intaglio engraving press, a wiping pad, an endless belt, means to move the wiping pad against the inner side of the belt and also to retract the pad, a die, means to reciprocate the die relative to said wiping pad so that when said wiping pad has been moved against the belt, the die will advance and contact the portion of the belt engaging the wiping pad for wiping the face of the die, and as the wiping pad is retracted the die will continue moving, means to advance the belt, means controlled by the means for moving the wiping pad to initiate advance of the belt after the die has had wiping engagement with the belt, and upon retracting the wiping pad, and means to stop the advance of the belt prior to the succeeding wiping contact of the die by the belt.

5. In an intaglio engraving press, a wiping pad, an endless belt, means to move the wiping pad against the inner side of the belt and also to retract the pad, a die, means to reciprocate the die relative to said wiping pad so that when said wiping pad has been moved against the belt the die will advance and contact the portion of the belt engaging the wiping pad for wiping the face of the die, and as the wiping pad is retracted the die will continue moving, means to advance the belt, means controlled by the means for moving the wiping pad to initiate advance of the belt after the die has had wiping engagement with the belt, and upon retracting the wiping pad, means to stop the advance of the belt prior to the succeeding wiping contact of the die by the belt, and means to prevent movement of the belt until the die moves beyond wiping contact with the belt.

6. In an intaglio engraving press a wiping pad, an endless belt, means to move the wiping pad against the inner side of the belt and also to retract the pad, means to reciprocate a die relative to said wiping pad so that when said wiping pad has been moved against the belt, the die will advance and contact the portion of the belt engaging the wiping pad for wiping the face of the die, and as the wiping pad is retracted the die will continue moving, means to advance the belt, means controlled by the means for moving the wiping pad to initiate advance of the belt after the die has had wiping engagement with the belt, and upon retracting the wiping pad, means to stop the advance of the belt prior to the succeeding wiping contact of the die by the belt, and means controlled by the last means for increasing the speed of movement of the belt.

'7. In an intaglio printing press, a wiping pad, an endless die wiping belt adapted to engage said pad, means to move the wiping pad toward and away from the belt, a pair of rollers through which said belt passes, a shaft on one of said rollers, an electric motor, clutch means interconnecting said motor and roller shaft, solenoid means controlling said clutch means, and means controlled by said wiping pad moving means to control the operation of said solenoid means.

8. In an intaglio printing press, a wiping pad, an endless die wiping belt adapted to engage said pad, means to move the wiping pad toward and away from the belt, a pair of rollers through which said belt passes, a shaft on one of said rollers, an electric motor, clutch means interconnecting said motor and roller shaft, solenoid means controlling said clutch means, means controlled by said wiping pad moving means to control the operation of said solenoid means, and means controlled by said belt for controlling the operation of said solenoid.

9. In an intaglio printing press, a wiping pad, an endless die wiping belt adapted to engage said pad, means to move the wiping pad toward and away from the belt, a pair of rollers through which said belt passes, a shaft on one of said rollers, an electric motor, clutch means interconnecting said motor and roller shaft, solenoid means controlling said clutch means, means controlled by said wiping pad moving means to control the operation of said solenoid means, and means controlled by said belt for controlling the operation of said solenoid, said motor having two speeds and means controlled by said belt controlled means for changing the motor from one speed to another.

10. In an intaglio printing press, a wiping pad, an endless die wiping belt adapted to engage said pad, a pair of rollers through which said belt passes, a shaft on one of said rollers, an electric motor, clutch means interconnecting said motor and roller shaft, solenoid means controlling said clutch means, means to move the wiping pad relative to the belt, means controlled by said wiping pad moving means to control the operation of said solenoid means, a die, means to move the die, and means controlled by the die moving means to control the operation of said solenoid.

11. In an intaglio printing press, a, wiping pad, an endless die wiping belt adapted to engage said pad, a pair of rollers through which said belt passes, a shaft on one of said rollers, an electric of said solenoid means, a die, means to move the die, means controlled by the die moving means to control the operation of said solenoid, and means to vary the control of the solenoid by the die moving means.

12. In an intaglio engraving press, a die wiping pad, an endless die wiping belt, a die, means for moving the wiping pad relative to the belt against the inner side thereof, means for moving the die against the outer surface of the portion of the belt contacted by the wiping pad and therebeing the wiping pad to deenergize the solenoid to clutch said motor to said roller for advancing the belt, and means controlled by the means for moving the die to energize said solenoid for declutching said clutch means to stop the advance of the belt.

13. In an intaglio printing press, a wiping pad,

other, and means to vary the point in the movement of the die at which the solenoid is deenergizecl.

14. In an intaglio printing press, a wiping pad, an endless die wiping belt adapted to engage said pad, a pair of rollers through which said belt passes, a shaft on one of said rollers, an electric motor, clutch means interconnecting said motor and roller shaft, solenoid means controlling said clutch means, means controlled by said wiping pad moving means to control the operaation of said solenoid means, means controlled energization of said solenoid by said die moving controlled means so that the belt keeps advancing.

15. In an intaglio printing press, a wiping pad, an endless die wiping belt adapted to engage said pad, a pair of rollers through which said belt passes, a shaft on one of said rollers, an elecmeans interconnecting said motor and roller shaft, solenoid means controlling said clutch means, means controlled by said wiping pad moving means to control the operation of said solenoid means, means controlled by said belt for controlling the operation of said solenoid, said motor having two speeds and means controlled by said belt controlled means ergization of said solenoid by said die moving controlled means so that the belt keeps advancing, and means operated by the means controlled by the means for moving the wiping pad to render said belt controlled means inoperative.

EDMUND A. GILLIS.

References Cited in the file of this patent UNITED STATES PATENTS 

